code: def _sum(
      a,
      axis=None,
      dtype=None,
      out=None,
      keepdims=False,
      initial=_NoValue,
  ):
      return umr_sum(a, axis, dtype, out, keepdims, initial)
  
file_path: catboost/contrib/python/numpy/py2/numpy/core/_methods.py
imports: from __future__ import division, absolute_import, print_function
  import warnings
  from numpy.core import multiarray
  from numpy.core import umath
  from numpy.core.numeric import asanyarray
  from numpy.core import numerictypes
  from numpy._globals import _NoValue
label_desc: Use image node_id 3 for calling a global function with example usage: _sum(a, axis, dtype, out, keepdims, initial) and returns: umr_sum